I’ve been playing with the radial blur technique on some images from the July 2, 2019 eclipse in South America using the affinity photo iPad version
First , I’ve empirically found that using a 10-20 angle on the blur result in very little or no effect
when I bump the angle up higher 30,60 even 90, then I start to see a significant effect
With a 90° angle I get a decent result, but only in one plane, X or Y, depending on whether I choose S-D or D-S
I’ve included an image of the original , S minus D, D - S and then the composite of the two ( brightened a bit)
I did not add the 128 offset which would lighten up the results overall
I understand that I am supposed to use the original minus the blur as an alpha layer on the original, not ready for that yet
If anyone can explain why I get the results I do as opposed to the people using PS w 10 or 20° radial blur
id appreciate comments and pointers
thanks